Category: Meet the Team

Donnie brings over 40 years of combined cycle plant experience and began his civilian career at Centerstream as an Auxiliary Operator 2 after serving in the US Navy. His technical expertise, leadership, and dedication led him to roles as Control Room Operator, Maintenance Lead, and now Plant Manager.

He has held a Class 1 Stationary Engineer’s License for 31 years and is known for his expertise in high-pressure systems, plant reliability, and power generation. In 2019, Donnie led a full auxiliary plant modernization, replacing the 480V distribution system and 13.8kV generation infrastructure that support Centerstream’s reliable operations.

With a career built on hands-on experience and a commitment to excellence, Donnie continues to lead with integrity, innovation, and a strong focus on safety.

Amir brings over 15 years of experience in energy infrastructure, project development, and operations. At Centerstream, he leads development efforts and daily operations while supporting M&A and financial strategy.

Before joining Centerstream, Amir was Director of Development at NextEra Energy, where he helped bring 1.5 gigawatts of renewable energy online, with more than 5 gigawatts in the pipeline. He also led major transmission projects across Texas, working with global developers and key industry partners to strengthen grid reliability.

Amir plays a vital role in advancing Centerstream’s work to deliver sustainable, efficient, and resilient energy systems.

We’re excited to introduce the leaders driving Centerstream’s mission forward, beginning with our CEO, Mason Miller.

With more than 20 years of experience in energy and infrastructure, Mason has led over $500 million in transactions and played a key role in developing and modernizing energy systems.

In 2015, he founded Ashley Energy to acquire and revitalize the city’s district energy system, securing a 20-year partnership with the City of St. Louis and setting the stage for long-term impact. Today, Ashley Energy is now Centerstream, reflecting our broader vision for the future of sustainable energy.

Mason leads Centerstream’s work developing and operating sustainable, efficient, and resilient district energy systems.

Stay tuned as we highlight more of the Centerstream team!